JPH04365796A - Handle device for shift fork - Google Patents

Abstract

PURPOSE:To store a fork space adjust operating handle, left as mounted to a shift screw, in a back surface side of a back rest. CONSTITUTION:A mounting boss 12 of an arm type handle 11 is mounted rotatably and axial direction movably to a protruding shaft part 3a of a shift screw 3. An internal gear 15 provided in the mounting boss 12 can be meshed or disengaged by axial directional movement relating to a rotation transmitting gear 7 fixed to the protruding shaft part 3a. On the other hand, a handle holding fixture 22 for holding the handle 11 in a raised attitude is provided in a back surface of an angle part 20 in a back rest 19. The handle 11 is drawn out to the outside from the side end surface of the back rest 19 to mesh the internal gear 15 with the rotation transmitting gear 7, so that a fork space can be adjusted, and after adjustment, the internal gear 15 is disengaged from the rotation transmitting gear 7 by moving the handle 11 to the inside and placed in a condition freely rotatable, thereafter to hold the handle 11 stored in a back surface of the back rest 19.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift fork with adjustable fork spacing, which is known as an attachment for a forklift, and more particularly to a handle device for manually rotating a shift screw to adjust the fork spacing. .

0002

2. Description of the Related Art In general, a shift fork for a forklift is constructed by manually rotating an arm-shaped handle attached to the end of a shift screw to move a pair of left and right forks having a shifter screwed onto the shift screw. The fork spacing can be adjusted by moving it horizontally along the Gerber. By the way, if the handle attached to the shift screw is left as it is, it will protrude significantly to the side of the backrest and become a hindrance during driving. Therefore, the handle is generally removable, and after adjusting the fork spacing, it is removed from the shift screw and stored in a predetermined storage location. An example of this is
For example, Japanese Patent Publication No. 3-4479 can be mentioned.

0003

[Problems to be Solved by the Invention] However, the above-mentioned conventional method requires the troublesome work of attaching and detaching the handle each time the fork spacing is adjusted, and the handle may fall off and be lost depending on how it is stored. There is a possibility that it will.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention has an object to provide a handle device for a shift fork that allows the handle to be stored behind the backrest while the handle is attached to the shift screw. do.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention is constructed as follows. That is, a handle device for a shift fork is configured to move a fork along a finger bar by rotating a shift screw that is rotatably installed horizontally on the left and right side plates of a finger bar, the side plates of the shift screw The mounting boss of the arm-type handle is rotatably and axially movably attached to the protruding shaft from the shaft, and the handle is moved in the axial direction by a part of the mounting boss and a fixing member fixed to the protruding shaft. The present invention is characterized in that it constitutes a dog clutch that engages or disengages at the finger bar, and that a handle holder capable of storing and holding the handle in an upright position is provided on the back side of the backrest attached to the finger bar.

[0006]

[Operation] In the present invention configured as described above, when adjusting the fork interval, when the handle is removed from the handle holder and moved outward along the protruding shaft, a part of the mounting boss and the shift Since a dog clutch constituted by a fixing member provided on the screw side is engaged, the fork spacing can be adjusted by rotating the handle and rotating the shift screw in this state. On the other hand, after adjusting the distance, if the handle is moved inward along the protruding shaft portion, the clutch is disengaged and the handle becomes able to freely rotate relative to the shift screw. Therefore, in this state, the handle can be appropriately rotated to take a suitable posture for storage, and then the handle holder can be held in an upright position to store it on the back surface of the backrest.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings. First, Example 1 shown in FIGS. 1 to 3 will be described. In FIG. 3 showing a shift fork of a forklift, a pair of left and right forks 2 are horizontally movably hung on a pair of upper and lower finger bars 1 fixed to the front surface of a lift bracket that moves up and down along a mast (not shown). has been done. A shift screw 3 is horizontally arranged between the upper and lower finger bars 1, and both ends of the shift screw 3 are rotatably supported by side plates 4 fixed to both ends of the upper and lower finger bars 1. shift screw 3
have a right-hand thread and a left-hand thread with the center part as a boundary, and the shifters 5 attached to the back surfaces of the left and right forks 2 are screwed into them. Therefore, when the shift screw 3 is rotated, the left and right forks 2 move toward or away from each other, and the distance between them is adjusted.

Next, a handle device attached to one shaft end of the shift screw 3 will be explained with reference to FIGS. 1 and 2. The shaft portion of the shift screw 3 is rotatably supported by the side plate 4 via a bush 6, and protrudes outward from the bush 6 by a necessary minimum length. A rotation transmission gear 7 and an idle gear 8 are arranged side by side on this protruding shaft portion 3a. The rotation transmission gear 7 is fixed to the small-diameter end of the protruding shaft portion 3a via a key 9, and the idle gear 8 disposed on the inside thereof is
It is fitted to the protruding shaft portion 3a so as to be freely rotatable, and is positioned by a retaining ring 10 such as a C-ring.

[0009] The handle 11 for operating the shift screw is of an arm type having a handle arm 13 having a cylindrical mounting boss 12 at one end and a grip 14 attached to the other end, and having a generally L-shape overall shape. . An internal gear 15 is formed over the entire length of the inner peripheral surface of the mounting boss 12, and the internal gear 15 meshes with the rotation transmission gear 7 and the idle gear 8 to be movable in the axial direction. A stopper 17 fixed to the end face of the portion 3a with a bolt 16 prevents the portion 3a from coming off.

The internal gear 15 meshes with both the rotation transmission gear 7 and the idle gear 8 at the maximum outward movement position regulated by the stopper 17 (when in use), and when moved inward from the same position, the internal gear 15 engages with both the rotation transmission gear 7 and the idle gear 8. The length in the axial direction is set such that the gear 15 can be removed from the rotation transmission gear 7. As described above, the axial movement of the handle 11 causes the internal gear 15 and the rotation transmission gear 7 to engage or disengage, thereby coupling or disengaging the handle 11 and the shift screw 3. The internal gear 15, which is a part, and the rotation transmission gear 7 fixed to the protruding shaft portion 3a constitute a so-called dog clutch 18.

Furthermore, the handle 11 is mounted so that the handle arm 13 can be located slightly outside the side end surface of the backrest 19, which will be described later, at the position immediately after the handle 11 is moved inward and the dog clutch 18 is disengaged. The positional relationship, dimensions, etc. of the boss 12, rotation transmission gear 7, etc. are set.

On the other hand, the backrest 19 provided to prevent cargo from collapsing has its left and right ends formed into an angled cross section, and the side surface 20a of the angled portion 20 is attached to the side plate 4 of the finger gar 1. It is fixed by a plurality of bolts 21 in a state where it abuts from the outside. The handle 11 is stored on the back side of the front part 20b of the angle part 20 of the backrest 19. That is, on the back side of the front part 20a, a handle holder 22 made of a spring clip whose opening direction is the rear side is installed above the protruding shaft part 3a, and the handle arm 13 of the handle 11 is attached to this. It can be fitted and removed.

The handle device of this embodiment is constructed as described above, and normally the handle 11 is arranged as shown in FIG.
As shown by imaginary lines in FIG. 2, it is held in an upright position by a handle holder 22 at a storage area on the back surface of the backrest 19. At this time, the internal gear 15 of the mounting boss 12 of the handle 11 is disengaged from the rotation transmission gear 7, and the dog clutch 18 is disengaged.

When adjusting the fork spacing, first, the handle 11 is rotated rearward to remove the handle arm 13 from the handle holder 22. Next, move the handle 13 to the stopper 1
When the handle arm 13 is pulled out to the outside to the position regulated by 7, the handle arm 13 touches the backrest 1
The internal gear 15 of the mounting boss 12 is moved to a position where it does not interfere with the angle portion 20 of the rotation transmission gear 7.
, and the dog clutch 18 is engaged. Therefore, in this state, if the handle 13 is rotated,
As the shift screw 3 is rotated, the fork 2 is moved along the finger bar 1, and the interval therebetween is adjusted.

After the interval adjustment work, when the handle 11 is moved inward, the internal gear 15 is disengaged from the rotation transmission gear 7, the dog clutch 18 is disengaged, and the handle 11 becomes free to rotate. In this position immediately after the clutch 18 is disengaged (intermediate position between the adjusted position and the retracted position), the handle arm 13 does not interfere with the front part 20b of the angle part 20 of the backrest 19, as shown by the imaginary lines in FIGS. 1 and 2. Since the setting is as follows, handle 1 at this position.
Adjust the posture of step 1. In other words, handle 1 after adjusting the interval
The position of No. 1 is indefinite, and there may be cases where it is not possible to move it further inward while maintaining the same posture after adjusting the interval. Therefore, at this time, the handle 11 is rotated to be positioned behind the backrest 19 to adjust the posture.

Thereafter, when the handle 11 is moved to the innermost position and positioned on the back side of the angle portion 20 of the backrest 19, and then rotated upward to stand up, the handle arm 13 is fitted into the handle holder 22. It will be done. In this way, most of the handle 11 except for a part of the grip 14 is stored and held on the back side of the backrest 19 in an upright position.

Next, a second embodiment of the present invention will be explained based on FIGS. 4 to 6. In this embodiment, the grip 14 of the handle 11 is changed to a bendable type. That is, Figure 4
As shown in FIG. 2, the grip 14 is rotatably attached to a bifurcated portion 13a formed at the tip of the handle arm 13 via a pin 23, and can be bent and extended with respect to the handle arm 13. A pair of detent balls 24 for fixing the grip 14 in an extended position with respect to the handle arm 13 are provided on the bifurcated portion 13a, and are biased by a spring 25. The grip 14 is held in the extended position by fitting into the provided recess 14a.

Furthermore, the angle portion 20 of the backrest 19
In the front part 20b, two upper and lower handle holders 22 and 26 made of spring clips are provided to hold the handle 11 in the stored position, and the lower handle holder 22 holds the handle arm 13. However, the upper handle holder 26 holds the grip 14. This improves the holdability of the handle 11 and prevents it from falling off unexpectedly due to vibration. In addition,
The other parts are the same as in the first embodiment.

Therefore, according to the handle device of the second embodiment, in addition to being able to perform the fork spacing adjustment work by operating the handle 11 in the same manner as in the first embodiment, in particular, the handle device 11 can be backrest 1
9, the grip 14 can be extended and stored, thereby preventing the grip 14 from protruding from the end surface on the backrest 19 side.

Next, a third embodiment of the present invention will be explained based on FIG. 7. This embodiment relates to a modification of the clutch 18 provided between the handle 11 and the shift screw 3, in which the mounting boss 12 of the handle 11 can be directly rotated on the protruding shaft portion 3a of the shift screw 3. While being fitted so as to be movable in the direction, a rotation transmission member 27 is fixed to the small diameter portion of the shaft end of the protruding shaft portion 3a, and uneven claws 12a, 27 are provided on the opposing surfaces of the mounting boss 12 and the rotation transmission member 27, respectively.
A is formed to constitute the dog clutch 18.

Therefore, according to this embodiment, the distance between the forks 2 can be adjusted in the same manner as in the first embodiment described above, and the number of parts can be reduced.

[0022]

[Effects of the Invention] As detailed above, according to the present invention,
The arm-type handle for adjusting the fork spacing on the shift fork can be stored on the back side of the backrest while remaining attached to the shift screw.
This eliminates the troublesome work of attaching and removing the handle that is required each time the fork spacing is adjusted in the past, and it also allows for easy repositioning between the handle storage position and the fork spacing operating position. can be,

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a handle device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the handle device.

FIG. 3 is an overall front view of the shift fork.

FIG. 4 is a longitudinal sectional view of a handle device according to a second embodiment of the present invention.

FIG. 5 is a partially cutaway side view showing the bending and stretching structure of the grip.

FIG. 6 is a plan view showing a handle holder for a grip.

FIG. 7 is a longitudinal cross-sectional view of a handle device according to a third embodiment of the present invention.

[Explanation of symbols]

1...Finger bar
2...Fork 3...Shift screw
4...Side plate 7...Rotation transmission gear
11...Handle 12...Mounting boss 13...Handle arm 15...Internal gear
18... Dog clutch 19... Backrest
20...Angle part 22...Handle holder

Claims (1)

[Claims] 1. A handle device for a shift fork in which a fork is moved along a finger bar by rotating a shift screw rotatably mounted horizontally on left and right side plates of a finger bar, wherein the shift fork is configured to move a fork along a finger bar. The mounting boss of the arm-type handle is rotatably and axially movably attached to the shaft protruding from the side plate of the handle, and a part of the mounting boss and a fixing member fixed to the protruding shaft allow the handle to be fixed. It constitutes a dog clutch that engages or disengages by moving in the axial direction, and on the back side of the backrest attached to the finger bar,
A handle device for a shift fork, comprising a handle holder capable of storing and holding the handle in an upright position.